| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code
table 4.1) |
| 11 |
Parameter number (see Code table
4.2) |
| 12 |
Type of generating process (see
Code table 4.3) |
| 13 |
Background generating process identifier (defined by originating centre) |
| 14 |
Analysis or forecast generating process identifier
(see Code ON388 Table A) |
| 15-16 |
Hours after reference time of data cutoff (see Note 1) |
| 17 |
Minutes after reference time of data cutoff |
| 18 |
Indicator of unit of time range
(see Code table 4.4) |
| 19-22 |
Forecast time in units defined by octet 18 (see Note 2) |
| 23 |
Type of first fixed surface (see Code table 4.5) |
| 24 |
Scale factor of first fixed surface |
| 25-28 |
Scaled value of first fixed surface |
| 29 |
Type of second fixed surfaced (see Code table 4.5) |
| 30 |
Scale factor of second fixed surface |
| 31-34 |
Scaled value of second fixed surfaces |
| 35 | NC - Number of Categories |
| 36 ― Repeat the following 12 octets for each category (i=1,NC) | |
| (36+12(i-1)) |
Code figure |
| (37+12(i-1)) |
Type of interval for first and second limit (see Code table 4.91) |
| (38+12(i-1)) |
Scale factor of first limit |
| (39+12(i-1)) - (42+12(i-1)) |
Scale value of first limit |
| (43+12(i-1)) |
Scale factor of second limit |
| (44+12(i-1)) - (47+12(i-1)) |
Scale value of second limit |
| (48+12(NC-1)) - (49+12(NC-1)) |
Year of end of overall time interval |
| (50+12(NC-1)) |
Month of end of overall time interval |
| (51+12(NC-1)) |
Day of end of overall time interval |
| (52+12(NC-1)) |
Hour of end of overall time interval |
| (53+12(NC-1)) |
Minute of end overall time interval |
| (54+12(NC-1)) |
Second of end of overall time interval |
| (55+12(NC-1)) |
n ― number of time range specifications describing the time intervals used to calculate the statistically-processed field |
| (56+12(NC-1))-(59+12(NC-1)) |
Total number of data values missing in the statistical process |
| 60 - 71 ― Specification of the outermost (or only) time range over which statistical processing is done | |
| (60+12(NC-1)) |
Statistical process used to
calculate the processed field from the field at each time increment
during the time range (see Code Table 4.10) |
| (61+12(NC-1)) |
Type of time increment between successive fields used in the statistical processing (see Code Table 4.11) |
| (62+12(NC-1)) |
Indicator of unit of time range
over which statistical processing is done (see Code Table 4.4) |
| (63+12(NC-1))-(66+12(NC-1)) |
Length of the time range over
which statistical processing is done, in units defined by the previous octet |
| (67+12(NC-1)) |
Indicator of unit of time for
the increment between the successive fields used (see Code Table 4.4) |
| (68+12(NC-1))-(71+12(NC-1)) |
Time increment between successive fields, in units defined by the previous octet (see Note 3) |
| 72 - nn ― These octets are included only if n>1, where nn = 72+12(n-1)+12x(NC-1) | |
| (72+12(NC-1))-(83+12(NC-1)) |
As octets 60 to 71, next innermost step of processing |
| 84+12(NC-1)-nn |
Additional time range
specifications, included in accordance with the value of n,
Contents as octets 50 to 61, repeated as necessary. |
| Notes: (1) Hours greater than 65534 will be coded as 65534. (2) The reference time in section 1 and the forecast time together define the beginning of the overall time interval. (3) An increment of zero means that the statistical processing the result of continuous (or near continuous) process, not the processing of a number of discrete samples. Examples of such continuous process are the temperatures measured by analogue maximum and minimum thermometers or thermographs and the rainfall measured by a rain guage. The reference and forecast times are successively set to their initial values plus or minus the increment, as defined by the type of time increment (one of octets (60+12(NC-1)), (73+12(NC-1)), (85+12(NC-1))...) For all but the innermost (last) time range, the next inner range is then precessed using these reference and forecast times as the initial reference and forecast time. |